BGP Questions

Q1: Into which of the following neighbour states must a neighbour stabilize before BGP Update messages can be sent?

a. Active

b. Idle

c. Connected

d. Established

Q2: BGP neighbours check several parameters before the neighbour relationship can be completed. Which of the following is not checked?

a. That the neighbour’s router ID is not duplicated with other routers

b. That the neighbour command on one router matches the update source IP address on the other router

c. If eBGP is used, the neighbour command points to an IP address in a connected network

d. That a router’s neighbour remote-as command refers to the same autonomous system number (ASN) as in the other router’s router bgp command (assuming that confederations are not used)

Q3: A group of BGP routers, some with iBGP and some with eBGP connections, all use loopback IP addresses to refer to each other in their neighbour commands. Which of the following statements are false regarding the configuration of these peers?

a. IBGP peers require an ibgp-multihop command for the peer to become established.

b. eBGP peers require an ebgp-multihop command for the peer to become established.

c. eBGP and iBGP peers cannot be placed into the same peer-group

d. For eBGP peers, a router’s BGP router ID must be equal to the IP address listed in the eBGP neighbour’s neighbor command.

Q4: What are the default BGP timers supported for Cisco’s implementation of OSPF?

a. 60-second keepalive, 180 second holdtime

b. 30-second keepalive, 60 second holdtime

c. 60 second keepalive, 120 second holdtime

d. 30-second keepalive, 120 second holdtime

Q5: True or False: To advertise a route to an eBGP peer, the route cannot have been learned from an iBGP peer

a. True

b. False

Q6: True or False: To advertise a route to an iBGP or eBGP neighbour. The route must be listed as valid in the output of the show ip bgp command.

a. True

b. False

Answers

1: D

2: C

3. A, D

4. A

5. B

6. A